It's certainly noble, but I'd rather spend my money on collectibles that I know I'd like. Subscribing to a general "lol so geeky" thing just ain't me, at least not right now. Like, I wouldn't be caught dead with anything from Attack on Titan, and I don't care for Game of Thrones, and they've made entire crates dedicated to them. The value of the items is quite good, though.
tl;dr: seems cool, but to recite your point, I'd end up with a LOT of useless shit.